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STEP 18: LOWER TUBE ASSEMBLY FOR STANDARD VAPOR TIGHT MODELS,PROCEED <br /> If a vise is used,clamp on the valve body casting only to TO STEP 20 ON PAGE 14. <br /> avoid damage to the float and tubes. Thread the lower <br /> tube onto the valve body until the lower tube bottoms FOR TESTABLE MODELS,PROCEED TO PAGE 13. <br /> out on valve body. Tube can be tightened by hand or <br /> with a strap wrench. If a strap wrench is used try to po- <br /> sition it on the threaded insert portion of the lower tube <br /> to prevent damaging the tube. <br /> Figure 18 Threaded insert \ <br /> NOTE:Before installing the valve in the tank,a pres- <br /> sure test can be performed on the valve to check for <br /> vapor tightness. Seal off both ends of the tube with <br /> inflatable plumber's plugs.Apply a maximum 10" <br /> W.C.(1/3 PSI)air pressure. If pressure does not hold <br /> and a leak can be located with soap solution,do not <br /> install the valve. Send the valve back to OPW for <br /> warranty evaluation. <br /> CAUTION:Do not over-pressurize. Excess pressure <br /> can damage the valve. <br /> STEP 19: CUT LOWER TUBE <br /> Measuring from the underside of the inlet tube flange, <br /> mark the overall length of the drop tube a distance of <br /> (B) minus 6". Determine dimension (B)from the meas- <br /> urements taken in Step 1, Figure 1 (Top of the Face Seal <br /> Adapter below the drain valve outlet in the spill con- <br /> tainer to the bottom of the tank). Saw off the excess <br /> tube at a 45-degree angle or per local codes or require- <br /> ments and file off any sharp burrs(Refer to Figure 24). <br /> Optional: Install the OPW Tank Bottom Protector on <br /> the lower tube(Refer to Installation instructions sup- <br /> plied with the Tank Bottom Protector). <br /> IMPORTANT:Remove all chips and shavings out of the <br /> cut end of the tube. DO NOT remove chips and shav- <br /> ings by dumping thru valve body. <br /> 12 <br />